Improvement in busk-fastenings



UNITED STATES PATENT OEEIoE.,A

ROBERT STOKES, OF BOW, ENGLAND, ASSIGNOR TO THOMSON, LANGDON 8U OO., OF NEW -YORK CITY.

lMPROVEMENT IN BUSK-FASTENINGS.

Specification forming part of Letters Patent No. 171,882, dated January 4, 1876; application filed August 2, 1875.

the manufacture of the stud-fastening known as Thomsons unbreakable husk-fastening. In this fastening the stud was turned to shape, and secured to the sti-ip of metal, which is made to clip the steelbusk by riveting the saine to the strip. As, however, great strain is often put upon the studs, they are very liable, if im perfectly riveted, to he torn out of their sockets, and the husk then requires to be replaced by a new one.

To avoid this inconvenience, I propose to make the stud in one piece with the strip of metal that clips the husk. This is ei'ected hy striking up or raising the stud out of the metal composing the strip.

In the accoinpanying drawing I have illustrated the several stages of the process by which I produce the improved stud-clip.

Having provided a strip of malleable sheet metal of the required gage, I submit it to the action ofa punch and die fitted to a iiy or other suitable press, whereby one, two, or more dish-shaped projections may he struck up at one blow, ol' the form indicated in the plan view, Figure l, and in the cross-section, Fig. 2. These projections may he conveniently struck up in pairs; and in that case the metal is shifted forward, after each striking u p, to a gaged distance, when the punch again advances, and repeats its blow. In like manner the blow isprepeated until the whole length of the metal strip has been -passed through the press. and subjected to the action ofthe punch and die, whereby a large number of the dishshaped projections are formed thereon. The stri p of metal, thus prepared, is next operated upon by a punch and die, which are so shaped as to bring the projections to the forin shown in Fig. 3. By the succeeding operations the projections are reduced from the form of a vinitted to the action of a heading-press, which is provided on its hed with a pair of slides,

that will advance toward,aiid gripe, the stud,

thereby holding it steady to receive the blow of the heading-die. While the stud is thus griped the die is brought down, and causedv to depress the end of the stud, thereby expandingit laterally, and converting it into a iianged head, a, as illustrated at Figs. 8. To complete the stud-clip b, the endsotthe metal are turned down atright angles, as illustrated at Figs. 9, and the clip b is then ready to be attached to the steel husk.

Iwould here observe that although, for the sake of clearness in the drawing, I have shown the dish-shaped projections as some distance apart, yetiii practice, in order as inuch as vpossible to economize metal, I strike up the projections and foi-in the studs as near together as can conveniently he done. I would also ohserve that the fly-presses used for the purposes of my invention are of the ordinary construction usually employed for striking up articles out of thin inet-al. claim to them as constituting any part of my invention; but

What I claim is- The stud-fastening for husks and other articles, consisting of a anged head, c, and clip b, the said head and clip heilig' composed ot' one piece of sheet metal, substantially in the manner and for the purpose specitied.

vDated the 23d day of June, 1875.

ROBT. STOKES.

Witnesses:

H. K. WHITE, A. S. BISHOP.

1 therefore lay no 

